This latest release includes a patch of a critical security flaw which allows attackers to take advantage on the vulnerabilities to cause a denial of service or launch malicious code. This patch is in fact to fix a potential buffer overflow vulnerability. Besides, there are of course some other stability and security fixes in this version.

So, if you are using an older version of FireFox, it’s recommended to install this latest version.

How to check what version of FireFox are you using ? Open your FireFox, click the Help on top of your toolbar, after that select About Mozilla FireFox. You will see the version number then.